JavaScript Batchverarbeitung / Stapelverarbeitung von function()

Wenn keine asynchronen Funktionen verwendet werden und das Skript die Ausführungsreihenfolge nicht unterbricht.

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var call_after_completion = function(callback){
    this._callback = callback;
    this._args = [].slice.call(arguments,1);
    this._queue = {};
    this._count = 0;
    this._run = false;
}

call_after_completion.prototype.add_condition = function(str){
    if(this._queue[str] !== undefined)
        throw new TypeError("Identifier '"+str+"' used twice");
    else if(typeof str !== "String" && str.toString === undefined)
        throw new TypeError("Identifier has to be a string or needs a toString method");
        
    this._queue[str] = 1;
    this._count++;
    return str;
}

call_after_completion.prototype.remove_condition = function(str){
    if(this._queue[str] === undefined){
        console.log("Removal of condition '"+str+"' has no effect");
        return;
    }
    else if(typeof str !== "String" && str.toString === undefined)
        throw new TypeError("Identifier has to be a string or needs a toString method");

delete this._queue[str];
    
    if(--this._count === 0 && this._run === false){
        this._run = true;
        this._callback.apply(null,this._args);
    }
}

var foo = function(){document.write("foo");document.close();}
var bar = new call_after_completion(foo);
var i;

bar.add_condition("foo:3-Second-Timer");
bar.add_condition("foo:additional function");
bar.add_condition("foo:for-loop-finished");

function additional_stuff(cond){
    document.write("additional things<br>");
    cond.remove_condition("foo:additional function");
}

for(i = 0; i < 1000; ++i){
    
}
document.write("for loop finished<br>");
bar.remove_condition("foo:for-loop-finished");
additional_stuff(bar);

setTimeout(function(){
    bar.remove_condition("foo:3-Second-Timer");
},3000);

Dies ist die Logik:

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Von Aleksandar Stajić|2020-10-28T17:35:58+01:00Oktober 28th, 2020|JavaScript, Software Development|Kommentare deaktiviert

Über den Autor: Aleksandar Stajić

In meiner bisherigen beruflichen Laufbahn habe ich an über 600 kleineren und größeren Projekten gearbeitet und durfte stets mit den neuesten Technologien innovative und individuelle Lösungen erarbeiten. Ich habe u.a. an den ersten Webapplikationen (Rich Internet Applications) für Datenerfassung und Auswertung über UMTS, an DB-Marktforschung und Tracking, Database Marketing, Online-Marketing, e-Commerce, CMS, Adoptive- und Responsive-Designs, unter Linux- und Windows-Servern und in allen OSI-Schichten gearbeitet.

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JavaScript Batchverarbeitung / Stapelverarbeitung von function()

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Über den Autor: Aleksandar Stajić